JPS6219599Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a rust prevention device for a lubrication/hydraulic tank.

Generally, lubrication/hydraulic tanks are constructed in an almost airtight state to prevent moisture from entering from the outside, which can cause rust, but as the temperature of the oil inside the tank rises, moisture may When the moisture in the tank evaporates, rust will inevitably form on the inner surface of the tank that has not come into contact with the oil, especially on the upper inner surface.

Therefore, before installing a tank on-site, the inner surface of the tank is pickled, treated with a hoodie, and then coated with anti-corrosion oil or paint. The oil film effect caused by the rusted oil may fade, or the paint may peel off and get mixed into hydraulic oil or lubricating oil, contaminating the oil, or the paint or rust may get mixed into the oil and flow into the circuit. It will damage the hydraulic equipment connected to the circuit, so please wait for a specified period of time (e.g. 2 years).
It was necessary to apply anti-rust oil or paint to the inside of the tank every time.

For this purpose, as shown in FIGS. 1a and 1b, spray pipes 3, . . . , 3 each having a large number of spray nozzles 2, . A large number of spray pipes are arranged at predetermined intervals, and each spray pipe 3, . . . , 3 is connected to a bypass line 5 via a control valve 4, . The bypass line 5 is connected via the control valve 10 to the downstream side of the filter 9 of the main line 8 through which oil is supplied, and oil is supplied to the entire upper surface of the tank 1 from each spray nozzle 2,...,2. A spray version has been proposed.

However, with this configuration, for example,
15000L tank (length 4.6m, width 2.5m, height
1.5m) 1, there are 5 spray pipes 3,...,3,
As many as 135 spray nozzles 2, .

This idea was devised to eliminate this drawback, and was devised to provide a rotating spray pipe so that oil could be sprayed over the entire upper surface of the tank by simply rotating one spray pipe. It is something.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the rust prevention device consists of a spray pipe 3 in which a large number of spray nozzles 2,..., 2 are installed at regular intervals in the axial direction above the oil level in a tank 1.
is arranged approximately in the center of the tank 1 to connect the spray pipe 3 to the bypass line 5, while a pump 7 driven by an electric motor 6 is connected to the tank 1.
The bypass line 5 is connected via a control valve 10 to the downstream side of the filter 9 of the main line 8 to which oil is supplied. Note that 11 is a cooler.

As shown in detail in FIG. 3, the spray tube 3 has its tip closed with a patch plate 12, and the spray nozzles 2, . . . , 2 are fitted into the side wall small holes 3a, . The side is rotatably supported by a support plate 13 welded to the upper plate 1a of the tank 1, and the rear end is passed through the side wall 1b of the tank 1, and a watertight seal is maintained by a packing member 14 attached to the side wall 1b. It is rotatably supported on the shaft.

The rear end of the spray pipe 3 and the end of the bypass line 5 are connected to a joint 15 attached to the spray pipe 3.
a and the joint 15b attached to the bypass line 5 through the O-ring 16, and the outer ring 1
5C, both joints 15a and 15b are detachably connected via an O-ring 16, and are mutually rotatable.

A lever 17 for manual operation is welded near the joint 15a of the spray pipe 3 as shown in FIG. 4a.

If the rust prevention device is configured as described above, the pump 7
When oil is supplied from the tank 1 to the main line 8 by the drive of the
A part of the oil is supplied to the spray pipe 3 from the spray pipe 3, and oil is sprayed from the spray nozzles 2, . . . , 2 of the spray pipe 3 toward the inner surface of the upper plate 1a of the tank 1.

At this time, when the worker holds the lever 17 and rotates the spray pipe 3, the oil sprayed from the spray pipe 3 in a so-called line is also sprayed in the rotational direction, and the oil is sprayed onto the upper plate 1a. The oil will now be sprayed evenly over the entire inner surface.

In the above embodiment, the lever 17 was manually operated, but as shown in FIG.
9, the spray pipe 3 can be automatically rotated by controlling the fluid supplied to the cylinder 18. In the above embodiment, the spray pipe 3 is connected to the bypass line 5 branching from the main line 8, and the oil is sprayed from the spray nozzle 2 by the discharge pressure of the main line 8. If there is a bypass line 5, a bypass line 5 may be connected to the return line.

As is clear from the above explanation, this idea places a rotating spray pipe inside the tank, supplies some of the oil in the tank to the spray pipe, and uses the rotating operation of the spray pipe to spray the top surface of the tank. Since the oil is sprayed uniformly over the entire surface, there is no need to provide a large number of spray pipes and spray nozzles as in the conventional method, and the cost can be greatly reduced.

In addition, since the spray tube can be constructed in a rotary manner, the structure is extremely simple and can be easily adapted to existing tanks, so it has various advantages and is of great practical value.

[Brief explanation of the drawing]

Figure 1a is a perspective view of a conventional rust prevention device, Figure 1b
is a cross-sectional view of the spray pipe shown in Fig. 1a, Fig. 2 is a perspective view of the rust preventive device according to this invention, Fig. 3 is a longitudinal sectional view of the spray pipe shown in Fig. 2, and Fig. 4 a is a lever-type Side view of the rotation mechanism, FIG. 4b is a side view of the cylinder type rotation mechanism. 1...Tank, 2...Spray nozzle, 3...
Spray pipe, 5... Bypass line (supply pipe),
17... Lever, 18... Double acting cylinder.

Claims (1)

[Scope of utility model registration request] It consists of a tank 1 having a horizontal upper plate 1a and one spray pipe 3 having a large number of spray nozzles 2 installed in the axial direction, and the spray pipe 3 is rotatable above the oil level in the tank 1. At the same time, a supply pipe 5 for supplying part of the oil in the tank 1 is connected to the spray pipe 3, and continuous rotation of the spray pipe 3 causes the spray nozzle 2 to flow through the horizontal upper plate on the upper surface of the tank 1. A rust prevention device for a lubrication/hydraulic tank, characterized in that oil is sprayed onto the inner surface of 1a.